Pusher Channels provides real-time communication between servers, apps, and devices.
Pusher Channels are used for notifications, chat, gaming, web-page updates, IoT, and many other systems requiring real-time communication.
When something happens in your system, it can update web-pages, apps, and devices. When an event happens on an app, the app can notify all other apps and your system.
Pusher channels can be with type public, private and presence.
click here ( for more information about pusher channels)
for more information see, Pusher docs.